Calibrated 14 x 12 mm Octagon Shape Gemstones from GemSelect

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 14 x 12 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not usually expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

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Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

Source: Bizrate

Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

Source: Bizrate

Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

Source: Bizrate

Overall Rating -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

Source: Bizrate

Overall Rating -> 9

Overall good, shipping prices just seem a little on the high side.

Posted By Steve in August, 2023

Source: Bizrate

Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 2023

Source: Bizrate

Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

Posted By Steve in November, 2023

Source: Bizrate

Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 2023

Source: Bizrate

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

Source: Bizrate

Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

Source: Bizrate

Overall Rating -> 9

Good interaction with site

Posted By Brick in September, 2023

Source: Bizrate

Overall Rating -> 9

The selection and filtering is a little overwhelming, but that's only because there is so much to choose from.

Posted By Kasper in June, 2023

Source: Bizrate

Overall Rating -> 10

Easy and fast

Posted By Mark in February, 2024

Source: Bizrate

Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Gemstones A-Z

Buy Octagon Shape 14x12 mm Gems

2.87 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.4 x 8 mm

8.36 carat Pear Shape Hiddenite, loose Certified Hiddenite from Afghanistan, Natural Untreated Gem, 13.6 x 10.6 mm

0.97 ct Oval Cat's Eye Moonstone, 7.7 x 5.9 mm From India

8.59 ct Carved Prehnite, 16.1 x 11 mm From South Africa

0.8 ct Loose Pink Sapphire, 5 x 3.8 mm Oval Cut From Madagascar

23.36 ct Cushion Jasper, 23.8 x 12.5 mm From Indonesia

0.51 ct Blue Kyanite, 3.7 mm Round Cut From Nepal

0.87 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5.1 mm

5.58 ct Diamond Cut Smoky Quartz, 11.6 mm From Brazil

0.76 ct Loose Yellow Sapphire, 5.2 mm Round Cut From Tanzania

9.77 ct Yellow Quartz, 15.3 x 15.1 mm Carved From Brazil

2.42 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6.1 mm

5.56 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.2 x 8.1 mm

3.38 carat Pear Larimar, loose Certified Larimar from the Dominican Republic, Natural Untreated Gem, 13.3 x 9.1 mm

1.06 ct Oval Peridot, 6.1 x 4.2 mm From China

2.15 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 9.1 mm

1.29 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 5.7 mm

0.84 carat Yellow Beryl, Pear Shape loose Beryl from Brazil, Natural Untreated Gem, 8.1 x 5.2 mm

27.02 ct Oval Tiger's Eye, 23.8 x 15.9 mm From Thailand

8.73 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 17.7 x 12.8 mm

1.95 ct Baguette Labradorite, 8.1 x 6 mm From Madagascar

2.68 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 12 x 8.6 mm

2.86 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.7 x 4.8 mm

2.23 ct Blue Apatite, 5.1 x 4 mm Oval Cut From Madagascar

9.65 ct Oval Pietersite, 16.6 x 12.3 mm From China

1.72 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 8 x 6.1 mm

40.58 ct Drilled Sphere Rutile Quartz, 14.4 mm From India

2.25 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 5.8 x 4.2 mm

13.06 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 15.9 x 12.9 mm

0.6 carat Round Grossularite Garnet, loose Certified Grossularite Garnet from Tanzania, Natural Untreated Gem, 5.2 mm

1.53 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 8.3 x 5.5 mm

1.53 carat Green Sapphire, Oval loose Sapphire from Madagascar, Natural Gems, 5 x 4 mm

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